Sigma-Locally Finite Family

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This entry contributed by Margherita Barile

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• ack(2,ack(2,1))
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• matching polynomial of the Petersen graph

Cite this as:

Weisstein, Eric W., with contributions by Margherita Barile. "Sigma-Locally Finite Family." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Sigma-LocallyFiniteFamily.html

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